US1149951A - Lever mechanism for operating throttle-valves. - Google Patents

Description

K. RUSHTONl LEV-ER MECHANISM FOR OPERATING THROTTLE VALVES. APPLICATION FILED MAR. I5, I9I3.

1,149,951. Patented Aug. 1o, 1915;

2 SHEETS-SHEET I- will/t PMNOCRAPII CCL. WASHINQTON. D. C.

K. IIIIS'HION.

LEVER MECHNISM FOR OPERATING THROTTLE VALVES. APPLICATION FILED III/m15, 1913.

Patented Aug. 10, i915.

2 SHEETS-SHEET 2.

.riNrTEn srariis PATENT oEEIoE. A

:KENNETH EUsHToN, OETHILALELPHIA, PENNSYLVANIA, AssIGNoR To. THE BALB-j WIN :LocoivIoTIvEWoEKs, or PHILADELPHIA, PENNSYLVANIA, AooEroRATIoN i inventionthe fulcrum Vrecedesas the operating lever is turned on` 0F PENNSYLVANIA. Y

" LEVER MEoHANrsivrEoE OPERATING THEoTTLEWALvEs.

To all 'whom t may concern: y i

Be it known that I, KENNETH RUsHToN, a citizen of the United States, residingin Philadelphia, Pennsylvania, have invented certain Improvements in LeverMechanisni for OperatingThrottlefValves, of kthe following is awspecication.y I t t n c. My inventionrelates to. certain. improvei ments in `lever mechanism `for operating throttle valves f of locomotives.

' The'obj ect of my invention is to construct the mechanism so that the valve canbe lift? ed olf of its seat with comparatively little exertion,y and can then be rapidly Vmoved to the full open position. Y y c Locomotives havefincreased in size and capacitytosuch an extent that a veiy'large 'p .throttle valve must be used, consequently these valvesare difficult to operate with the old lever mechanism. In the lever mechanism constructed in accordance with my is movable, giving a variable leverage.

When the valve is to be lifted 0H'l of its seat thefulcrum is close to the connection with the valve rod, and, as the valve is lraised from its seat and balanced, then the fulcrum its pivot, thus decreasing the .leverage but increasing the movement of the valve rod. I

am thus enabled to readily operate the valve without extending the movement of the yoperating lever. c

In the accompanying drawings: Figure 1 is aplan/view of sufticientof lever mechanism for throttle valves to showthe lever in'position when the valve is closed; Fig. 2 is a similar view showing the mechanism in the position when the valve is full open; Fig.v 3 is a sectional view on theline a-n Fig. 1; Fig. 4 is a perspective view of the two armed lever which carries the fulcrum block; Fig. 5 is a perspective Vview of the fulcrum block; Fig. 6. is a perspective view of a portion of the operating lever, and Figs. 7

and 8 are views illustrating. modifications of the invention. v i

Referring to the drawings, 1 is the boiler.- 2 is a stuliing box of anyordinary type. 3 is a rod which passes through the stuffing box and is connected to the'throttle d valve within the boiler.

4c isa head securedto the end `ofthe rod c Specication of Letters yPatent'. .'Pateted Aug 10, 1915 Appiication mealimitait'i5,191e.Usnaiivavarare.` y l having-a toothed segmentj ofthe ordinary YP f s' V.

^ 6 is the perating lever pivoted at 7 to the head 4 and havingan extension 8 beyond the pivot 7. v, .n p

v,9 is lthe latch which locks the lever tothe segment so as to hold the lever 6 in the positioiito which Ait is adjusted. This latch isoperated by the ordinaryk mechanism extending to the hand hold of thelever. n

Y 10g Ais a bracket secured to the boiler, rin the present instance, and. pivotedv atpll to this bracket is a two armedlever 12. One arm 13 of this lever Aengages therod 3 .and

the other arm 14:V carries the fulcrum'block ,e

15 the"y block beingpivoted to fthe arm, as shown, and the extension 8 of theoperating lever Lpasses freely through thisv block, as

y and fitslin the socket in thehead 4c, and lin order to apply my invention to' *thev usual construction I reduce the head'at 17 to form alower shoulder for the reception .of a ring 19 and alsoy reduce the length of the head and locate an upper ring 18 between the end ofV the head andV a Vshoulder onV they valve rod 3.. lhe rounded-heads 13of the lever iitbetween'thetwo rings. The head is secured to therod bythe r'ordinary diagonal pin-20, Fig. 3; .A c

e The fulcru'in blocklis quadrangular'in shape, inthe presentinstance, andhas two trunnions 21 which extend through openings in the larms 14: of the lever 12.

The .operation is as follows; When the valve is closed, the operating lever 6 is in the position illustrated inliig.y 1, and the ful crum block lfis close to the piv0t'7 of said lever, consequently,

Fig. 1, the valve is slowly forced olf of its seat creasin `the .leverage but increasinv kthe Y v b. e

A when the operating lever 'is moved in thedirection of the arrow,

movement of the kvalve with 'a minimum amount of movement of the operatinglever.A

By using the construction illustrated in armed lever carrying'the movablefulcruml for the ordinary link to which the operating lever isdirectly connected. l f InFig. 7., I have illustrated a modification of my invention in which a ksingle pivoted arm is substituted for the two armed lever illustrated in Fig. ll. The head 4 is attached Vto the valve yrod 3, as in Fig.l 1, and the lever 6a has aslotted extension beyond thepivot 7. Inthis slotted extension is a block a.

12L is the leverpivoted at '11a' and trunnions 21a of the block are mounted in the lever, as shown. rIhe end 22 Aof ther lever l2a*bears against the rear surface ofthe segmentl 4 and a spring 23, controlled by an adjustingA screw 24, bears against the block lafand holds the end `of the lever 22 against said segmentVr so that as the Alever 6 is moved y in the direction of the arrow, Fig. 7, the rear portion of the segment 4: acts as a cam and 30 OrCeS the lever inthe direction ofV its arrow againstthe pressure of the spring and carries the ulcrum block away from the pivot 7 v n' l The lever 12 may be geared to the valve rod in place or the construction shown in Fig. l. n The rod may have a rack 25 thereon andthe lever may have a toothed segment 26 meshing with the rack, as in Fig. 8. While I have described myinvention as throttle valves located in locomotive boilers,

it will be understoody that the invention can be used for operating other valves withouty departing from the essential features of the invention. n

I claim: n p f `1. The combination in throttle valve operating mechanism, of a valve rod; an operating lever pivoted thereto; a ulcrumV for moving the fulcrum away from the'pivot and thus decreasing the leverage as the ley ver is operated to open the throttle valve.

' 2; The combination in lever mechanism Jfor operating throttle valves, of a valve rod;

a head .secured thereto; an operating lever pivoted to the head; a bracket; Aa .two armed lever pivoted tothe bracket, one arm of said lever engaging the rod; a Jfulcrum block carried by the other arm ofY the lever; an kop'- erating lever having an extension beyond the pivotand projecting through said block 'so that as the operating lever is moved in one direction, the ulcrum block willmove away from the pivot and when 'the lever is the valve lthe 'ulcrum" block will be *moved particularly adapted for use in operating` said lever; and means Jfor automatically moved in theV opposite direction thefulcrum block will ,move toward the pivot.

3. The. combination in mechanism for/operating throttle valves, of va valve rod; an operating lever pivoted thereto; `a lever pivoted to aXed point and having two arms,

one arm-carrying the ulcrumv for the operating lever, the other arm engaging the valve rod so that when the operating lever is moved to open the valve, they fulcrum will be close to they point where the lever is con'- nected to the valve rod and as the lever is moved, the ulcrum`will be moved away from said pivot. c t

`4'. The combination in means for operating throttle valves,of a valve rod;"a head Y secured-to the rod and having a toothed segment; an operatinglever'pivoted Ato the head and having a latch engaging the teeth of the segment, the operating lever having an eX- 85 tension beyond the pivot; a Julcrum block ,y mounted on the extension; and means carrying the ulcruin block andfengaged bythe rod so that as the lever is operated tov open from lthe pivot of theilever on the kf.

away head.

, f A5. The combination inrmechanism for o perating throttle valves, of v'a Gvalve' rod; a head secured thereto; flanges on-'the rod; an 95 operating lever pivoted to the head and having a rearward extension; a two armed lever; a Xed bearing Jfor said lever,"one arm of said lever extending intoA the space between the kflanges of the rod; a ulcrum block pivotally mounted on thev other arm of thelever, the extension of they operating lever projecting through the ulcrumgblockv so thatvas the operating lever is movedto open the valve, the ulcrum block travels on the extension.' t

6. The combination in means for operating throttle valves, of a valve rod; a head thereon; flanges on the rod; an operating lever pivoted to the head and having an eX- tension beyond the pivot; a bracket; a pivot pin on the bracket; a two armed levery consisting of two plates spaced apart, onefarm of yeach plate having a rounded head eX- tending' intopthe space between the flanges of 115 the rod; and a block pivotally mounted between the other arm of the platel and also mountedon the eXtensionof the operating lever.' f d' 7. The combination in means for operating valves, of a valve rod; a head secured tothe rod ;`an operating lever-pivoted to the head; afulcrum block mounted on the lever;and meansengaging the ulcrum block actuated bythe valve rod so that as'the opy125 erating lever is moved to 'open the valve the fulcrum will be moved away y:from the point where the lever is pivoted to the head.

. 8. The combination in valve operating mechanism,"of a yvalve rod; an operating 130 1,149,951 Y i l 3 lever pivoted thereto; a fulerum for said In testimony whereof, I have signed kmy lever; and a lever carrying the ulcrum and neme to this specification, in the presence of lo pivoted to a fixed point and controled by two subscribing witnesses. Y the rod so that as the rod is moved y the operating lever itcauses the lever carrying KENNETH RUSHTON' the fulorum block to move it away from the Witnesses:

' point where the operating lever is pivoted.v to LEON P. THOMAS,

the rod. J. CARRYL SHINN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, 1).'0.

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